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arXiv 2104.13909math.AP
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变系数标量场方程近常数解的存在性与稳定性

Existence and stability of near-constant solutions of variable-coefficient scalar field equations

Mashael Alammari, Stanley Snelson

AI总结:

本文研究实轴上线性项含变系数的半线性标量场方程,克服非微扰谱障碍证明近常数稳态存在,并分别建立真空态及奇偶性条件下近常数稳态的渐近稳定性。

摘要:

本文研究实轴上一类线性项具有变系数的半线性标量场方程。这些系数不一定是常数的小扰动。我们证明,在适当条件下,非平移不变的线性算子会产生在空间变量上“几乎常数”的稳态。证明的主要挑战来自一种无法用微扰方法处理的谱障碍。接下来,我们考虑常数和近常数稳态的稳定性。我们在不对系数、势或初始数据施加任何奇偶性假设的情况下,建立了真空态关于 $H^1\ imes L^2$ 中扰动的渐近稳定性。最后,在奇偶性假设下,我们证明了近常数稳态的渐近稳定性。

英文摘要:

This article studies a class of semilinear scalar field equations on the real line with variable coefficients in the linear terms. These coefficients are not necessarily small perturbations of a constant. We prove that under suitable conditions, the non-translation-invariant linear operator leads to steady states that are ``almost constant'' in the spatial variable. The main challenge of the proof is due to a spectral obstruction that cannot be treated perturbatively. Next, we consider stability of constant and near-constant steady states. We establish asymptotic stability for the vacuum state with respect to perturbations in $H^1\times L^2$, without placing any parity assumptions on the coefficients, potential, or initial data. Finally, under a parity assumption, we show asymptotic stability for near-constant steady states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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